fix cleaning up tasks on media deletion

app/sync/models.py

@@ -379,6 +379,10 @@ class Media(models.Model):
             Source.SOURCE_TYPE_YOUTUBE_CHANNEL: 'title',
             Source.SOURCE_TYPE_YOUTUBE_PLAYLIST: 'title',
         },
+        'thumbnail': {
+            Source.SOURCE_TYPE_YOUTUBE_CHANNEL: 'thumbnail',
+            Source.SOURCE_TYPE_YOUTUBE_PLAYLIST: 'thumbnail',
+        },
         'description': {
             Source.SOURCE_TYPE_YOUTUBE_CHANNEL: 'description',
             Source.SOURCE_TYPE_YOUTUBE_PLAYLIST: 'description',
@@ -600,6 +604,11 @@ class Media(models.Model):
         field = self.get_metadata_field('title')
         return self.loaded_metadata.get(field, '').strip()
 
+    @property
+    def thumbnail(self):
+        field = self.get_metadata_field('thumbnail')
+        return self.loaded_metadata.get(field, '').strip()
+
     @property
     def name(self):
         title = self.title

app/sync/signals.py

@@ -85,8 +85,7 @@ def media_post_save(sender, instance, created, **kwargs):
     # Triggered after media is saved
     if created:
         # If the media is newly created start a task to download its thumbnail
-        metadata = instance.loaded_metadata
-        thumbnail_url = metadata.get('thumbnail', '')
+        thumbnail_url = instance.thumbnail
         if thumbnail_url:
             log.info(f'Scheduling task to download thumbnail for: {instance.name} '
                      f'from: {thumbnail_url}')
@@ -109,7 +108,7 @@ def media_post_save(sender, instance, created, **kwargs):
             instance.save()
     # If the media has not yet been downloaded schedule it to be downloaded
     if not instance.downloaded:
-        delete_task_by_media('sync.tasks.download_media', instance.pk)
+        delete_task_by_media('sync.tasks.download_media', (str(instance.pk),))
         verbose_name = _('Downloading media for "{}"')
         download_media(
             str(instance.pk),
@@ -122,7 +121,11 @@ def media_post_save(sender, instance, created, **kwargs):
 def media_pre_delete(sender, instance, **kwargs):
     # Triggered before media is deleted, delete any scheduled tasks
     log.info(f'Deleting tasks for media: {instance.name}')
-    delete_task_by_media('sync.tasks.download_media_thumbnail', instance.pk)
+    delete_task_by_media('sync.tasks.download_media', (str(instance.pk),))
+    thumbnail_url = instance.thumbnail
+    if thumbnail_url:
+        delete_task_by_media('sync.tasks.download_media_thumbnail',
+                             (str(instance.pk), thumbnail_url))
     # Delete media thumbnail if it exists
     if instance.thumb:
         log.info(f'Deleting thumbnail for: {instance} path: {instance.thumb.path}')

app/sync/tasks.py

@@ -74,7 +74,6 @@ def map_task_to_instance(task):
         instance = model.objects.get(pk=instance_uuid)
         return instance, url
     except model.DoesNotExist:
-        print('!!!', model, instance_uuid)
         return None, None
 
 
@@ -108,8 +107,8 @@ def delete_task_by_source(task_name, source_id):
     return Task.objects.filter(task_name=task_name, queue=str(source_id)).delete()
 
 
-def delete_task_by_media(task_name, media_id):
-    return Task.objects.drop_task(task_name, args=(str(media_id),))
+def delete_task_by_media(task_name, args):
+    return Task.objects.drop_task(task_name, args=args)
 
 
 def cleanup_completed_tasks():

app/sync/tests.py

@@ -291,6 +291,9 @@ class FrontEndTestCase(TestCase):
         found_thumbnail_task1 = False
         found_thumbnail_task2 = False
         found_thumbnail_task3 = False
+        found_download_task1 = False
+        found_download_task2 = False
+        found_download_task3 = False
         q = {'queue': str(test_source.pk),
              'task_name': 'sync.tasks.download_media_thumbnail'}
         for task in Task.objects.filter(**q):
@@ -300,9 +303,21 @@ class FrontEndTestCase(TestCase):
                 found_thumbnail_task2 = True
             if test_media3_pk in task.task_params:
                 found_thumbnail_task3 = True
+        q = {'queue': str(test_source.pk),
+             'task_name': 'sync.tasks.download_media'}
+        for task in Task.objects.filter(**q):
+            if test_media1_pk in task.task_params:
+                found_download_task1 = True
+            if test_media2_pk in task.task_params:
+                found_download_task2 = True
+            if test_media3_pk in task.task_params:
+                found_download_task3 = True
         self.assertTrue(found_thumbnail_task1)
         self.assertTrue(found_thumbnail_task2)
         self.assertTrue(found_thumbnail_task3)
+        self.assertTrue(found_download_task1)
+        self.assertTrue(found_download_task2)
+        self.assertTrue(found_download_task3)
         # Check the media is listed on the media overview page
         response = c.get('/media')
         self.assertEqual(response.status_code, 200)
@@ -329,8 +344,12 @@ class FrontEndTestCase(TestCase):
         response = c.get(f'/media/{test_media3_pk}')
         self.assertEqual(response.status_code, 404)
         # Confirm any tasks have been deleted
-        tasks = Task.objects.filter(**q)
-        self.assertFalse(tasks)
+        q = {'task_name': 'sync.tasks.download_media_thumbnail'}
+        download_media_thumbnail_tasks = Task.objects.filter(**q)
+        self.assertFalse(download_media_thumbnail_tasks)
+        q = {'task_name': 'sync.tasks.download_media'}
+        download_media_tasks = Task.objects.filter(**q)
+        self.assertFalse(download_media_tasks)
 
     def test_tasks(self):
         # Tasks overview page

app/sync/youtube.py

@@ -53,7 +53,6 @@ def download_media(url, media_format, extension, output_file):
         'outtmpl': output_file,
         'quiet': True,
     })
-    print(opts)
     with youtube_dl.YoutubeDL(opts) as y:
         try:
             return y.download([url])